1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f030442b7718931c31a3a1e3d70c004a765b09b2171c7bade90191aac9fdca. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48cf092f-ea55-4d54-9b02-4700f4c63c7a.json and https://artists.proofprofile.net/proofs/artist/48cf092f-ea55-4d54-9b02-4700f4c63c7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hosianna - Adolf Fredriks Bachkör - Christmas music
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0df17264b9d871e7bc02fba9849601f9e341dbd82302c824e8694df151b15ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908020.
Barnet i Betlehem (the Child of Betlehem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7025209a237c8d0f86e9579efad7cb3388e8df96e9d2b7781aa0e71b59daa81. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8091ec4a512ce4fb858f5e5f5446dd4565d49f73a6eb24d8230c0f51f8dbccf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c33de0d6a31ec99c5ebd58e1e3616d599102a2a0d2a1c7c559e0cabb2ee06e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908050.
Judas Maccabaeus HWV 63 Dotter Sion fröjda dig (Daughter of Sion Rejoice) [Sung in Swedish]: Dotter Sion [Daughter of Sion]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1e08b2aedf07de9a8acf05a90155d36a14dafe4d5b7a3b6d52b32cdea8660e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908060.
När det lider mot jul (Christmas Draws Nigh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda63625bfff7e49aed5567b2c17c355f385bc0c2a57f0bebc4715ef6f0ceb5fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e318e1cea06b5385d27341f7a37b794e73928aea52e8f4629b60df3140b02. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c3394ff566bb4499c071ddd9c62fad2625ec04bcc5fb974a58f939557860f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908100.
Vad ar det som star pa? (What Is Going on?): Vad är det som står på?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6444087e2cdb397e98558f4f4233a8b9521c21b8546a370b978d7c4f58130668. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908110.
Schlichte Weisen Op. 76: Marias vaggsång
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f574a5ea919da2ff3c9fde5fbcfaa21a78294c8871e5b615d7bdcfcb355c41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf398b722088285ebf206d08457ee1475809c6036e65afe163dd2af55e89c745. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908130.
Kungarnas marsch (Arr. A. Ohrwall for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71fd200c4c5931192e3a9989e1c5d8060c36e47add488e3ffeb30dc2b6c26a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4c046dcccca1db8b355470db6382fe50e26fa3e1f407713bd5469129eee3c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab1ec2af746d53c873007f2040798542d74d63cbabee769d6b864b3c6f66cf8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fdc56513be847c99bbe3293426ab927d4f9ff9859870976e19b916491ce2e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908180.
Barnet i Betlehem (The Child of Betlehem)
Adeste fideles (O Come All Ye Faithful) (arr. R. Sund and J. Bexelius): Dagen är kommen
Judas Maccabaeus, HWV 63 (Sung in Swedish): Dotter Sion (Daughter of Sion)
Nar det lider mot jul (Christmas draws nigh): När det lider mot Jul
Vad ar det som star pa? (What is Going on?): Vad är det som står på?
Schlichte Weisen, Op. 76 (text by M. Boelitz, L. Rafael, Traditional, C. Busse, R. Braungart and S. Seyboth): Marias vaggsång
Then Svenska Messan: Herre förbarma tig öfver oss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9da83eed18e516e58f27afb3bce91735e20f023628217bed856bf9325ee32e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105430.
Then Svenska Messan: Ära vare Gud i högden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656c3cf0a1670c14fb2a45df365b074cc81f5f4cac4b535fd885e68951656675. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105431.
Then Svenska Messan: Och frid på jordene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c90fa777b7aa34a9ad2c350c01bb44a048d7536009228bd996e3d5a02977b4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105432.
Then Svenska Messan: Vi tacke tig för tina store äro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d41cb791d9c4dc36132682c11b011c592c942edb03ee6f8cf87aa0e1c35e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105434.
Then Svenska Messan: O Herre Gud himmelske konung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782a977b731e6c4beb82f0f8504a6f4ff250a33816031ab866161877adbb06f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105435.
Then Svenska Messan: Tu som borttager verldenes synder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998b12ab481c9372ad10e45e512271ea76592202680e9501e5d77189fdbacdd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105440.
Then Svenska Messan: Med then helga anda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f00b1ab31d24612c172f2a7a33cddda17538072154e18bed6594a4d2e6622cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62105442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c16222bffb772a158efe16cf02323835c97359065ba02980e558f26227117. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA0700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6f20f81aa50595ad4ce57a4bcdf1d9e96b3e9384a3378a86d93f2a38b6513. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC9908010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc209a162ff56533e0def7f879c883561a0764795dda48b84499e2709801dc0c9. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC8002140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43095bb22c4390c5be425155b290ac7e97f65aff3267b41619db4d300dcc2c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC8002200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e0ec6a2c2cde8fd46b6c557694ed89f8e1f860eacac5e3d7fcf58db7e25a37. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC7004110.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fbba4741279befa6c5085729706c352ac677f5c1c24d70c82e2b84dcb5c385. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC8002210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb193b5491bfa17ecddad21672f78daa127f81adc27d92373d2966937e136d4c9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC8002150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eef78cb5e30be2533e8d6c1fed2be31f9342f164193758e88880d77267038f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC8002100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a6033449b1cb7d4b7724533b4a8b434de8d19d269a5bdbfb43bb734b6469ca. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAC8002170.